The Defense Threat Reduction Agency (DTRA) contracting activity proposes to procure without using full and open competition, in accordance with Revolutionary Federal Acquisition Regulation (FAR) Overh... The Defense Threat Reduction Agency (DTRA) contracting activity proposes to procure without using full and open competition, in accordance with Revolutionary Federal Acquisition Regulation (FAR) Overhaul 12.102(a), preventative maintenance x-ray services.